Lee Changno, Oh Jaehong
Department of Civil Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea.
Department of Civil Engineering, Korea Maritime and Ocean University, Busan 49112, Korea.
Sensors (Basel). 2020 Apr 8;20(7):2100. doi: 10.3390/s20072100.
KOMPSAT-3, a Korean earth observing satellite, provides the panchromatic (PAN) band and four multispectral (MS) bands. They can be fused to obtain a pan-sharpened image of higher resolution in both the spectral and spatial domain, which is more informative and interpretative for visual inspection. In KOMPSAT-3 Advanced Earth Imaging Sensor System (AEISS) uni-focal camera system, the precise sensor alignment is a prerequisite for the fusion of MS and PAN images because MS and PAN Charge-Coupled Device (CCD) sensors are installed with certain offsets. In addition, exterior effects associated with the ephemeris and terrain elevation lead to the geometric discrepancy between MS and PAN images. Therefore, we propose a rigorous co-registration of KOMPSAT-3 MS and PAN images based on physical sensor modeling. We evaluated the impacts of CCD line offsets, ephemeris, and terrain elevation on the difference in image coordinates. The analysis enables precise co-registration modeling between MS and PAN images. An experiment with KOMPSAT-3 images produced negligible geometric discrepancy between MS and PAN images.
韩国地球观测卫星KOMPSAT - 3提供全色（PAN）波段和四个多光谱（MS）波段。它们可以融合以获得在光谱和空间域中具有更高分辨率的锐化图像，这对于目视检查而言更具信息性和可解释性。在KOMPSAT - 3先进地球成像传感器系统（AEISS）单焦点相机系统中，精确的传感器对准是MS和PAN图像融合的先决条件，因为MS和PAN电荷耦合器件（CCD）传感器是以一定偏移量安装的。此外，与星历和地形高程相关的外部效应会导致MS和PAN图像之间的几何差异。因此，我们提出基于物理传感器建模对KOMPSAT - 3的MS和PAN图像进行严格的配准。我们评估了CCD线偏移、星历和地形高程对图像坐标差异的影响。该分析实现了MS和PAN图像之间精确的配准建模。对KOMPSAT - 3图像进行的实验在MS和PAN图像之间产生了可忽略不计的几何差异。
